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Work out a safer home-buying range with full housing costs, DTI limits, and higher-rate stress testing built in.
What this tool helps you answer
Use this tool when you want a grounded estimate of how much home you can buy without stretching the monthly budget too far. It works best as a planning filter before pre-approval, not as a substitute for underwriting.
The purchase price estimate is only one part of the result. The monthly budget cap, stress payment, DTI ratios, and cash-to-close estimate usually tell you whether the scenario is genuinely comfortable or just technically possible.
Housing budget = Income-based DTI cap minus monthly debt obligationsNext step
Work out a safer home-buying range with full housing costs, DTI limits, and higher-rate stress testing built in.
Editorial review
This page combines the live tool, input guidance, worked examples, and operating limits so Mortgage Affordability Planner stays useful even before users interact with the calculator.
Reviewed by Klartext Tools against the current Mortgage Affordability Planner workflow on 2026-03-01.
Last updated:
Use with judgment
Page scope
A household with strong income, modest debt, and a meaningful down payment tests a realistic home budget.
Useful for estimating a sustainable buying range when the household still wants room in the monthly budget.
Raise HOA dues or insurance after loading the example to see how non-mortgage housing costs reduce affordability.
A buyer with less cash and a higher mortgage rate checks how much the range tightens under pressure.
Good for seeing how higher rates and lower equity quickly shrink the affordable purchase price.
Lower the DTI limit or increase the stress-rate buffer if you want a more conservative underwriting view.
Start with a monthly payment you could still carry after maintenance, utilities, and savings, then stress test the scenario before you treat the result like a real home-buying limit.
Enter gross income, other monthly debt payments, and the DTI limit you want to stay under.
Add your down payment, mortgage rate, loan term, and recurring housing costs like taxes, insurance, HOA, and PMI.
Run the planner to see the monthly housing budget and estimated affordable purchase range.
Increase the rate or lower the down payment to check how much buffer you actually have.
Compare a comfortable base case with a harsher rate-and-cash case before you treat the output like a real purchase ceiling.
A household with strong income, modest debt, and a meaningful down payment tests a realistic home budget.
Sample inputs
Sample outcome: Useful for estimating a sustainable buying range when the household still wants room in the monthly budget.
Raise HOA dues or insurance after loading the example to see how non-mortgage housing costs reduce affordability.
A buyer with less cash and a higher mortgage rate checks how much the range tightens under pressure.
Sample inputs
Sample outcome: Good for seeing how higher rates and lower equity quickly shrink the affordable purchase price.
Lower the DTI limit or increase the stress-rate buffer if you want a more conservative underwriting view.
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